Horn for fastener-inserting machines.



'S. A. DOBYNE.

HORN FOR FASTENER INSERTING MACHlNES- APPLICATION FILED APR. 6. 19M.

1,216,784. Patented Feb; 20, 1917.

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APPLICATION FILED APR- 6, 914- v 1,216,784. Patented Feb. 20,1917.

. 2 SHEETS-wSHE-ETZ- STEPHEN A. DOBYNE, OF ST. LOUIS, MISSOURI, ASSIGNORTO CHAMPION SHOE MACHINERY COMPANY, OFST. LOUIS, MISSOURI, A CORPORATIONOF MISSOURI.

HORN FOR FASTENER-INSERTIN G MACHTINE S.

To all whom it may concern:

Be it known that I, STEPHEN A. DOBYNE, a citizen of the United States,and residing at St. Louis, in the State of Missouri, have inventedcertain new and useful Improvements in Horns for Fastener-InsertingMachines, of which the following is a specification.

This invention relates to work supports,

and more particularly, to work supports or horns for fastener insertingmachines.

A fastener inserting machine, especially when used in the manufacture ofshoes, is provided with a horn, and this horn must be intermittentlydepressed during the feed of the work, and then released to permit thefastener to be driven. Since the thickness of the stock varies, thedistance between the tip of the horn and the presser-foot necessarilyvaries as the fastener inserting operation is performed on the work.This requires means, having an adjustable connection with the horn, fordepressing the horn.

" chine runs at a high speed, the wear and tear on these pawls andratchets is very great, necessitating their constructions to be veryheavy. V

The objects of this invention, therefore, are to provide work supportcontrolling mechanism in which the parts are so constructed andrelatively arranged, as to be capable of resisting the wear and tearduring the operation of the machine; which will be simple inconstruction and positive, accurate, and effective in its operation.

Further objects will appear from the detail description taken inconnection with the accompanying drawings, in which:

Figural is a longitudinal vertical section through a fastener insertingmachine embodying this invention,

Fig. 2 is an enlarged section on the line 22, Fig. '1, showing the horncontrollin mechanism in elevation,

Specification of Iietters Patent.

' j ustable nuts 21.

Patented Feb. 20, 1917.

Application filed April 6, 1914. Serial No. 829,853.

Fig. 3 is a side elevation of Fig. 2,

Fig. at is an end elevation of Fig. 3,

Fig. 5 is an enlarged section on-the line 5 5, Fig. 3, j

Figs. 6 and 7 are enlarged detail perspect1ve views, and, r

Fig; 8 is an enlarged section on the line 88,'Fig. 1. l v i Referring tothe accompanying drawings, 10 designates a column having a machine head11 thereon provided with fastener in serting mechanism, including adriver 12, and having a presser-foot 13.

A horn spindle 14 having a horn 15 thereon, is mounted to slidevertically in the col- 7 mum, and passes, at its lower end, through asleeve 16. The'sleeve 16 slides in a bracket 17 provided with ears 18clamped by bolts 19 to thecolumn. The horn spindle has a spring 20bearing at one end against the sleeve 16, and at its other end againstad- The lower end of the spindle has a nut 22 thereon, abutting againsta shoulder in the sleeve, and limitgig the upward movement of the hornspin- A bell crank lever is pivoted at 23 between the side members 24:on the bracket 17, and has one arm 25 thereof connected by a link 26with the sleeve 16, and has the other arm 27 connected by a link 28 withthe trea-" dle 29, Which treadle is pivoted at 30 in the base 31supporting the column 10. A link 32 extends through the column and has aspring 33 thereon bearing at one end against the adjustable nuts 34 andat the other end against the column, this link being connected with thetreadle so as to normally tend to hold the treadle in raised position. 7The arm 25 and the link 26 form together a toggle, and the movement ofthis toggle is limited by an adjustable set screw 35 on the bracket 17.The rear end of the treadle has an aperture 36 therein, through whichpasses the end 37 of a clutch rod 38, having adjustable nuts 39 thereonto abut against the end of the treadle.

The construction of the mechanism so far described is substantially thesame as shown and described in my co-pending application, Serial No.820,216, filed Feb. 21, 1914. When the parts are in theposition shown inFig. 1, with the treadle depressed and the toggle 25-26 straightened,the spring 20 will hold the horn in raised position, and this horn canbe depressed by means of a horn controlling .mechanism, as .hereinafterdcscribed, When, however, the treadle is re leased, thetoggle willbecome broken, and the sleeve16, which forms an abutment for the spring20, will drop, carrying the horn.

with it so as to permit removal of the work from the horn.

The horn spindle 14 has mounted'thereon a sleeve 40, provided withtrunnions 41 carrying blocks 42, engaging the forked end 43 of a lever44 pivoted at 45 in the column.

The other end of the lever is forked to support a block 46. This blockis provided with ribs 47 engaging grooves in the lever, and has a part48 extendingunderneath the lever and carrying segmental tooth members49. Springs 50 are connected at one of their ends to pins 51 on' theblock, and at their other ends to pins'52 on the lever, so as tonormally move the block to the left,Fig. 3, the movement of the blockbeing limited by the engagement of the block with shoulders 53 on thelever. V V

A bell. crank lever 54 is pivoted at 55 in the column, and has a slottedarm 56 through which passes a link 57 pivoted at 58 on the lever 44,connected to the horn spindle. A spring 59 on the link 57 bears V at oneend against an adjustable nut 60 on the link, and at its other endagainst a washer 61 hearing against the arm 56.

nut 62 is mounted on the link on the opposite side of the arm 56. Theother arm 63 of the bell crank lever 54 is pivoted to a link 64 whichhas pivoted at 65 a pair of spaced wedge plates 66 provided with teeth67. These wedge plates are connected and spaced'at one end by the link64, and at the other end by rivets or screws 68 and collars 69, so as toform, in effect, a single adjustable member. The inside faces of thewedge plates are providedwith guideway grooves to receive ribs 70 of ablock 71. The block 71 is mounted on the reduced end 72 of a hornactuator or controlling rod 73, and is secured in position by a plate 74and a nut 7 5. The horn controlling rod 73 is guided by lugs 76 on thecolumn 10, and is actuated from a suitable cam 77 on the main driveshaft of the machine. 7

During the operation of the machine, the

cam 77 will intermittently move the horn controlling rod 73 up and down.This will, in turn, move the wedges 66 up and down, and these wedgeswill, upon the upstroke, first engage the tooth members 49, and thenswing the lever 44 in the direction of the arrow, Fig. 1, to depress thehorn against the tension of the spring 20, during the feed of the work.

Thereafter the rod'73 will a ain move down and permit the spring 20 toreturn the to raise its right-hand end. The movement downward of theleft-hand end of the lever 44 will, however, swlng the bell crank leverv54 in the direction of the arrow, Fig. l, and

move the wedges 66 to the left, Fig. 1, there- 7 by, in efiect, raisingthe tooth faces 67 imme diately below the tooth members 49 an amountequal to that which these tooth members are raised by the swinging ofthe lever 44. The parts are so relatively proportioned that tor everythickness of work, and for every position of the horn, the verticaldistance between the coiiperating toothed members 46 and 66 ismaintained uniform. For equal movements of the horn controlling rod(which has a constant vertical stroke or movement) the horn will,therefore, be depressed equal distances irrespective of the thickness ofthe work and of the positicn of the horn. .As the horn controlling rod73 is moved upwardly, causing an engagement between the relativelyadjustable members 46 and 66 and lifting of the rear end of lever 44,the horn is depressed, and during the depression of the horn, thesemembers are interlocked due to the interlocking or intermeshing of theirteeth. During the depression of the horn, however, the left-hand end ofthe lever 44 will 'move downwardly, and since the bell crank lever 54 isat this time fixed against oscillating movement by the rod 73, thespring 59 will be compressed. As soon as the work is fed, and when thehorn controlling rod 73 is depressed, the adjustable member 66 will movedown until the horn is stopped by the engagement of the same with thework; then this adjustable member 66 moves down out of engagement withthe coiiperating member 46, and the spring will then set the adjustablemember 66 to the new position corresponding to the new thickness of workbetween the horn and the presser-foot. The adjustable member is,therefore, automatically set for the new thickness of work, the movementof this member being stopped by. the engagement of the arm 56 with thestop 62.

In certain positions of the parts, the teeth on the cotiperating members46 and 66 may not be in a. position to intermesh, and the points of theteeth may, in fact, be nearly opposite. The cotiperating members must,therefore, have a slight relative adjusting movement so as to move intomesh. The spring 59 furnishes a yielding connection for permitting suchslight movement of the adjustable member 66 to the right, Figs. 1 and 3.In order, however, to permit an adjusting movement of the toothedmembers 49, the block 46, supportingthese members,

permit a slight adjusting movement in one trolling mechanism.

direction, but is stopped in the other direction. This constructionpermits the teeth to move into mesh, irrespective of the originalrelative position of these teeth.

This construction is ideal as a horn con- The adjustment for differentthicknesses of stock can be made exceedingly fine, as the teeth on thecooperating members can be made comparatively fine, due to the factthat' 'there isa direct engagement of the teeth in a meshing direction,and there is practically no strain: along the teeth tending to stripthem. These teeth will, moreover, always mesh, no matter how notdepended upon to throw them into engagement, as is the case'with pa-wlsand ratchets. In view of the direct meshing action of the teeth,stripping is entirely obviated.

It is obvious that various changes may be made in details ofconstruction without departing from the spirit of this invention, and itis to be understood, therefore, that this invention is not to be limitedto the specific details shown and described.

Having thus described the invention, what is claimed is:

1. In a machine of the class described, a longitudinally movable worksupport, alongitudinally movable actuator, a block 'arranged foradjustment along one of said parts and operatively connected with theother of said parts for movement thereby, a wedge member mounted behindsaid block for movement with that part along which the block moves, saidmember being adjustably movable perpendicularly to the line of movementof said block, and operative conas/nections for adjusting said member tocompensate for movements of the block under variations in the thicknessof the work, thus to maintain uniformity of movement of the support bysaid actuator.

2. In a machine of the class described, a longitudinally movable worksupport, a longitudinally movable actuator, a block arranged foradjustment along said actuator and operatively connected with saidsupport for movement thereby, a wedge member mounted for movement withsaid actuator behind said block, said member being adapted forcooperation with said block and being adjustably movable perpendicularlyto the line of movement of the latter, and operative connections foradjusting said member to compensate for movements of the block undervariations in the thickness of the work, thus to maintain uniformity ofmovement of the support by said actuator.

3. In a machine of theclass described, a longitudinally movable worksupport, a longitudinally movable actuator therefor, a block and a Wedgemember associated with one ofsaid parts and having cooperating engagingfaces, said block being adjust-1 able: along {said part and said memberbeing movable with said part behind said block andhaving an adjustingmovement perpendicularly to the line of movement of the latter, andoperative connections controlled by the'm'ovements' of' said support andactuator for moving said block along said wedge -supportingpart and foradjusting said wedge member to accord with such movement of the block,to compensate for variations in'the thicknessof the work and mamtalnun1form1ty of move- 7 V ment of the support by the actuator. rapid theirrelative movement, as a sprlng is 4. In a machineof the class described,a longitudinally movable work support, a longitudinally movable actuatortherefor, a block and a wedge member associated with one of said partsand having cooperating toothed engaging faces, said block beingadjustable along said part and said member being movable with said partbehind said block and having an adjusting movement perpendicularly tothe line of movement of the latter, and operative connections controlledby the movements of said support and actuator for moving said blockalong said wedge supporting part and for adjusting saidmember to accordwith such movement of the block, to compensate for variations in thethickness of thework and maintain uniformity of movement of the supportby the actuator.

5. In a machine of the class described, a longitudinally movable worksupport, a longitudinally movable actuator therefor, a

block and a wedge member associated with one of said parts and havingcooperating engaging faces, said block being adjustable along said partand said member being movable with said part behind said block andhaving an adjusting movement perpendicularly to the line of movement ofthe latter, and operative connections controlled by the movements ofsaid support and actuator for moving said block along said wedgesupporting part and for adjusting said member to accord with suchmovement of the block, to compensate for variations in the thickness ofthe work and maintain uniformity of movement of the support by theactuator, said connections including a spring constructed and arrangedto permit an inde-' pendent movement of said support and actuator. A I

6. In a machine of the class described, a work support, an actuatortherefor, a pair of toothed engaging members, one connected with saidwork support and the other with sand actuator, means for connecting oneof said members with said work support, constructed to adjust saidmember in accordance with the thickness of the work, and

means permitting relative adjusting movement of said member While movinginto enand meanspermitting meshing of said teeth irrespective to therelative positions of said members.

8. In a machine of the class described a work support, an actuatortherefor, a toothed member connected to one of said 20 members, atoothed wedge adjustably con nected to the other of said members, and ayieldable adjusting connection between said Wedge and said work support.

In testimony whereof I affix my signature 25 in the presence of thesetwo witnesses.

STEPHEN A. DOBYNE. i/Vitnesses:

J. H. BRUNINGA, A. B. CREMER.

Copies of this patent may be obtained for five cents eachfby addressingthe Commissioner of Patents, Washington, D. G.

